the amount of resistance created in a wire. Another factor is the conductivity of the material we are using. Some metals are just more electrically conductive than others. As long as I use the same type of metal for each wire‚ my experiment will remain fair. Cross Sectional Area The thicker the wire‚ the less resistant it is. This is because there are more electrons in the metal that are free to move as a current. Also‚ there is more space for the electrons to flow‚ so more can fit down. This
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lithosphere. It is separated from the ore found in the lithosphere. Gold’s symbol is Au. Its atomic number is 79 and has an atomic mass of 196.96655 amu. Its melting point is 1064.43°C‚ while its boiling point is 2807.0 °C. It is a transition metal and is yellow or gold in colour. There are also many principles used in the separation of gold. One of these is boiling points in the process of smelting. In Froth floatation‚ the principle is the organic chemicals in the gold which causes it to
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elements where a material with better or different properties is produced. The range of alloys produced depends on the solubility of the constituents and the proportion of them. The number of possible alloy combinations is almost endless since any metal can be alloyed in pairs or in multiples. Alloys can be classified into two main categories:Interstitial alloy. It is when smaller elements‚ such as boron‚ carbon‚ nitrogen‚ or silicon‚ fill the spaces or interstice of the main metallic structure or
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2/25/13 Chemistry H. Mrs. Halme Objective: Your task is to determine the density of 3 known metals: Zinc‚ Copper‚ and Lead. They are each marked. You must then calculate the density of an unknown metal and determine its identity based on your data from your known samples. Reagents: None Equipment: Lead Copper Zinc Triple Beam Balance Graduated cylinder Unknown metal (Magnesium) Beaker Calculator Procedures Preparation: We observed the given equipment‚ and then placed
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every job we have in the company. Our company is a metal recycling company whose process is buying metals‚ excluding precious metals‚ processing the metals‚ and the final product will be sold to larger recycling companies for a profit. We ensure that the metals are in the cleanest form to sell for the largest amount of profit. This process can include shredding of material‚ crushing of cars‚ removing plastics and trash‚ sorting of different metals‚ and packaging of materials to ship out. The process
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Introduction Aim: To investigate the factor affecting voltage of voltaic cell. Research Question: How does coupling of different metals from the electroactivity series affect the overall voltage of the galvanic cell? Background Information: The voltaic cell converts chemical energy to electrical energy to generate electricity. There are usually 2 electrolytes used containing spectator metal ions. A salt bridge is used to connect the 2 electrolytes in order to enable the transfer of ions. Circuit is connected
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Lure of precious metals: Precious metals were a major pull factor for the west because everybody was looking for the opportunity to become wealthy individuals which was known as the American dream at that time. Gold and silver was the metals that every single person was looking for in the westward expansion‚ immigrants and citizens were willing to kill to get their hands on any gold or silver mine. The killing‚ weirdly enough‚ was mostly was the removal of Indians. The India wars: War was inedible
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Why do metals conduct electricity? Metals conduct electricity. The delocalised electrons are free to move throughout the structure in 3-dimensions. They can cross grain boundaries. Even though the pattern may be disrupted at the boundary‚ as long as atoms are touching each other‚ the metallic bond is still present. Liquid metals also conduct electricity‚ showing that although the metal atoms may be free to move‚ the delocalisation remains in force until the metal boils. Why are metals malleable
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Zinc is a lustrous bluish-white metal. It is brittle and crystalline at ordinary temperatures but it becomes ductile and malleable when heated between 110°C and 150°C. It is a reactive metal that can combine with oxygen and other non-metals and will react with dilute acids to release hydrogen. Mostly zinc is used for galvanizing iron with more than 50% of metallic zinc goes into galvanizing steel and in the preparation of certain alloys. Then‚ zinc is added during industrial activities such as mining
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Guess Paper – 2009 Class – XII Subject –Chemistry : Solid State (Q.1) The appearance of colour in solid alkali metal halides is generally due to: ( 1 mark ) (a) Frenkel defect(b) Interstitial positions(c) F-centres(d) Schottky effect (Q.2) Schottky defects in crystal is observed when ( 1 mark ) (a) unequal number of cations and anions aremissing from the lattice(b) equal number of cations and anions are missing from the lattice(c) an ion leaves its normal siteand occupies an interstitial
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